Update UPGRADING.md to show the newest Focus APIs

Signed-off-by: Gergely Nagy <algernon@keyboard.io>

docs/UPGRADING.md

@@ -273,8 +273,13 @@ class FocusExampleCommand : public Plugin {
     return ::Focus.sendName(F("FocusExampleCommand"));
   }
 
-  EventHandlerResult onFocusEvent(const char *command) {
+  EventHandlerResult onFocusEvent(const char *input) {
-    if (strcmp_P(command, PSTR("example")) != 0)
+    const char *cmd = PSTR("example");
+
+    if (::Focus.inputMatchesHelp(input))
+      return ::Focus.printHelp(cmd);
+
+    if (!::Focus.inputMatchesCommand(input, cmd))
       return EventHandlerResult::OK;
 
     ::Focus.send(F("This is an example response. Hello world!"));
@@ -348,8 +353,8 @@ class ExamplePlugin : public Plugin {
  public:
   ExamplePlugin();
 
-  EventHandlerResult onFocusEvent(const char *command) {
+  EventHandlerResult onFocusEvent(const char *input) {
-    if (strcmp_P(command, PSTR("example.toggle")) != 0)
+    if (!::Focus.inputMatchesCommand(input, PSTR("example.toggle")))
       return EventHandlerResult::OK;
 
     example_toggle_ = !example_toggle_;
@@ -408,8 +413,8 @@ class ExampleOptionalCommand : public Plugin {
  public:
   ExampleOptionalCommand() {}
 
-  EventHandlerResult onFocusEvent(const char *command) {
+  EventHandlerResult onFocusEvent(const char *input) {
-    if (strcmp_P(command, PSTR("optional")) != 0)
+    if (!::Focus.inputMatchesCommand(input, PSTR("optional")))
       return EventHandlerResult::OK;
 
     ::Focus.send(Layer.getLayerState());